<!DOCTYPE html>
<html>
  <head>
    <title>router</title>
    <meta charset="UTF-8" />
  </head>

  <body>
    <a href="#1">go to 1</a>
    <a href="#2">go to 2</a>
    <a href="#3">go to 3</a>
    <a href="#4">go to 4</a>

    <div id="app"></div>

    <div id="div404" style="display: none;">你要找的内容飞了</div>
    <script src="main.js"></script>
  </body>
</html>
